'Ancestors' in the Bible

{Do we not all have} one father? Has not one God created us? Why [then] are we unfaithful {to one another}, profaning the covenant of our ancestors?

From the days of your ancestors you have turned aside from my rules, and have not kept [them]! Return to me and I will return to you," says Yahweh of hosts, "but you say, 'How shall we return?'